24M bisexual here. In a commited relationship with a female..
Anyways, on Mar 16th I made the biggest mistake of my life and hooked up with another male I met on a hookup site. He told me he was clean, and negative. I topped. The sex lasted about 3 minutes and I pulled out. About a week later I had what I believe was an HPV outbreak (my first) and thats when I started to get concerned.

I got my first HIV antibody test done at 20 days : Results were negative.
I started reading about the window period, and decided to get an antibody/antigen combo test done at 6 weeks (44 days post exposure) and the result to that test was negative also.

At this point, I was feeling pretty comforted with the negative results. But then my significant other started showing signs of ARS, 2 weeks to the day after the last time we had intercourse. She's having night sweats, diarrhea, slight fever.

What are the risks of me catching HIV as a top from a one time exposure? and what are the chances that my 6 week negative HIV test will actually turn positive at the 3 month mark?

I'm terrified that not only I am sick, but my significant other to.

Hi there, and thanks for contacting the AIDS Vancouver Helpline for your HIV/AIDS related health information. It seems you're quite worried about the possibility of HIV transmission after an encounter, and the accuracy of some tests you've had since then. We're happy to answer your question for you.

There is one key piece of information we'd need to further assess the risk associated with this encounter, and that is whether you used a condom or not. If you were indeed wearing a condom, this would be a low risk situation, meaning that there are specific things required for transmission to occur (like the condom breaking). If you weren't wearing a condom, this is classified as a high risk situation, meaning that of the transmissions that have occurred, most have occurred in situations such as these. This would not mean that transmission occurred in this case. So when you're looking at the results from your tests, keep these risk levels in mind. Remember that it is always a very good idea to wear protection during your encounters, as it prevents the transmission of both HIV and other STIs.

As for the tests you've had, here is a bit more information on them:

First off it's great you were proactive and went for testing, as testing is really the only way to know your status conclusively. You've had an antibody test at 20 days, and the DUO test at 6 weeks. Unfortunately, due to you still being in the window period of both tests, neither was accurate enough to show your results conclusively (both are conclusive at least 3 months or 12 weeks post exposure). So considering the potential risks involved we'd recommend you go for another test at least 3 months after the exposure.

As for the symptoms you or your partner are experiencing, we at AIDS Vancouver are not healthcare providers so cannot comment on them. That said, the only way to know your status conclusively is to go for testing, which you've already done. The reason for this is that the symptoms of an HIV infection closely mimic the symptoms of many other common medical conditions. If you're concerned about symptoms, we'd encourage you to head to a physician for further assessment. At that point we'd probably recommend you provide as much information as possible to the physician.

We understand this is a pretty difficult position for you. We hope that the information we've provided here at least gives you a bit of direction on what to do from here. Thanks for contacting the AIDS Vancouver Helpline


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Test Name Method Window Period Conditions
Enzyme Immunoassay Antibody (EIA) 3rd Generation (ELISA) Blood test that looks for antibodies. Up to 95% of infections are detectable within 4-6 weeks post exposure. Most people develop detectable antibodies in 21-25 days. Most commonly available testing method. Conclusive at 3 months post exposure.
4th Generation EIA Blood test that looks for antibodies AND p24 protein antigens. Commonly referred to as the "combination," "combo" or "DUO" test. P24 protein is detectable immediately after infection but only for the first few weeks. The antibody (ab) test has a window period of 4-12 weeks post exposure. This test is widely available in North America. Most HIV specialists consider this test to be conclusive at 6 weeks but official HIV testing guidelines still recommend re-testing at 12 weeks for conclusive results. Conclusive at 3 months post exposure.